What PCOS is, and why it matters for fertility PCOS is a hormonal and metabolic condition characterized by a variable combination of ovulatory dysfunction, clinical or biochemical hyperandrogenism, and polycystic ovarian morphology on ultrasound. Not everyone has all features, and…

What hormonal imbalance means in women A hormonal imbalance means that one or more hormones are present in too much or too little quantity, or that tissues are not responding to them normally. In women’s health, the most commonly discussed…

How hormones regulate fertility Fertility depends on a coordinated hypothalamic-pituitary-gonadal axis. The hypothalamus releases gonadotropin-releasing hormone in pulses, which signals the pituitary gland to produce follicle-stimulating hormone and luteinizing hormone. These hormones stimulate ovarian follicles to grow, produce estradiol, and…

Understanding female infertility as a biological pathway Pregnancy depends on several steps happening in sequence: the ovary must release a mature egg, sperm must reach the egg through the reproductive tract, fertilization usually occurs in the fallopian tube, the early…

What fertility means biologically Female fertility is not one organ or one hormone working alone. It reflects communication among the hypothalamus and pituitary gland in the brain, the ovaries, cervix, fallopian tubes, endometrium, immune signaling, metabolic health, and sperm from…

Why “everything right” still may not lead to pregnancy Conception is probabilistic, not guaranteed. Even when intercourse occurs in the fertile window and both partners are generally healthy, the chance of pregnancy in a single cycle is not 100%. An…

The usual timelines: 12 months, 6 months, and earlier Clinically, infertility is often defined as the inability to conceive after 12 months of regular unprotected intercourse. For people aged 35 or older, many professional groups recommend evaluation after 6 months…

What are environmental reproductive toxicants? Environmental reproductive toxicants are substances in the environment that may interfere with reproductive function. They can be naturally occurring, such as arsenic in groundwater, or human-made, such as certain industrial chemicals, pesticides, plasticizers, and combustion-related…

What the terms mean Failed implantation usually refers to a situation in which fertilization may have occurred, but the embryo does not implant successfully into the endometrium, or implantation begins too briefly to produce a sustained detectable pregnancy. In natural…

Tracking can predict fertile days without confirming ovulation A common reason ovulation tracking “fails” is that the method is doing less than the user thinks it is doing. Many tools are prediction tools. They estimate when ovulation may happen based…